What powers jon.cz?
Last seen Jun 2026 · 38 technologies across 19 categories
Advertising
Microsoft Advertising
since Oct 2024
Analytics
CDN
Cookie compliance
Font scripts
Font Awesome
since Jan 2019
Google Font API
since Jan 2019
JavaScript frameworks
JavaScript graphics
Chart.js
since Jan 2019
JavaScript libraries
Maps
Google Maps
since Jan 2019
Miscellaneous
Operating systems
Debian
since Jan 2019
Page builders
Webflow
since Apr 2022
Photo galleries
PhotoSwipe
since Sep 2022
Programming languages
Security
Cloudflare Bot Management
since Nov 2024
reCAPTCHA
since Jan 2019
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Web frameworks
Google Web Toolkit
since Mar 2020
Web servers
Audience
- 68% phone
- 33% desktop
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.94 / 10 · ranked #1,693,461 of all domains
13 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 4.5 MB · 94 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.jon.cz | 29 |
| jon.cz | 22 |
| portal.jon.cz | 9 |
| isp.jon.cz | 7 |
Full technology history →
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Recent changes
- dropped WhatsApp Business Chat Jan 2026